Plug switching device.



A. s. PEARL & c. AJANSEN.

PLUG SWITCHING DEVICE. APPLICATION FILED DEC 25, 4 942;

1 169317, v 'ratemea Jan, 1916.

2 SHEETS-SHEET 1.

.A. s; PEARL sic. A. 1mm

PLUG SWITCHING DEVICE, APPLICATION HLED DEC-26,1912- I LMQJW. merited Ja11-.25,191fi.

2 SHEETS-SHEET 2.

swuiclun c 51 ccuctructicu m u ll All in 30. 3, AND 1%., JAN

GAGQ, ILLINQI$,

Specification 0f iileabem Applicaficu filed December .26, 1912 Serial No. 2 38,5923.

Chi z'ezzzpccizively, in {she ccuuizy of Cool; and cm cf 1 llDOiS, have mvenied cerium new 4 W 3 111 IDIQFOWfiIIlQHlIS 1n Plug 11 Devices, cf 'W l'uch the following cillculu'iml, reference bfiill'lg had to the pau liue; drawings.

il'n'enticu relutee to plug switching cs ccmpz-ilslng a rc'aceptucle adapted m a Wall 01' other suitable euppart and k 11;; connected by suitable Wires to a motel" Ul electric current,

The object cf our invention 0e previ ie u new 1nd improved cclisiructlon of plug vice cl this type by reason of maybe mere attached. mole than can be alone in the use cf c. r ccnstruefilcus, by re son cu which "as ccinl'ucts of both membeis may be mere fully insulutmi from each other, and

which the 11 be ti c rec-e J by reuscu of which the vcontacts cf: the plug member 21111 be mere readily removed replaced.

fills another object cf thisiuvenfiicu to improve clevlcce of this type in sundry de 3 hereinafter pointed out fiheac objects are illustrated in. the cg: drawings and hereinafter described. Thea; which "WE l ell 10 be new set forth in the claims.

"he thewingc,-ligm*e l a vertical sectien thrmwl'; cur p11 "errccl form Fig, :2 a cecucn taken on I ig. 1; Fig, is u secicn on line 8-3 of Fig. 1; Fig. -i; is u Q'Bfifil'ill he??? zuutal seclzic' lllucugl'l a medlfiecl form. 0f cur d 5 is c, section on um 55 cf BT1 3:; ancl, Fig. 6 is an enlarged detail 01? cue cf the contacts of the plug shown in 5 Referring to F 1, 2 and 3, in which ccwcspoucliug parts are inrlicelerl by the 1c reference c m1.ucte1's,-'1U indicates lhe cc g1 01": receptacle, to back oil WlTl'lCH is suitably secured a base 11 fcrmecl cf Weed, 2' 1 be1.,'fiber, '01 other euiiieble in eulcilug muueriel. 12 iuiicaltesu place cf cu 'tabli u,. -clutiug material secured by line 2-? cf l s, and residing at Eulcywccd and electrlcal ener v other device requiring an us by which we have ccccmabout them are free 110 screws or in any other suifiablc manner he the base 11. The casing l0 provided, with an opening '13 through which the wires i l Hum a ljzwuixc other suitable scarce i may be led iutc sulclcusing Where they are connected in (my callable manner to the receptacle cciufiacfz-s 15 which are SQCUI'Ql' in any stumble manner in the plate 19- Each oi the receptacle ccubwis l5 QXeQIlElS some little distance 1 yoml the from;

I) face of the plae 152. as is best shown in Fig l. 16 indicafies tubular members which. round the receptacle ceutucis l5 and cxtcucl cutwmrfi from face 01'": acid plate 12 a shcrt custauce beycucl the emls of the contacts 1T--l8 inclicele the two parts of like casing of the plug-xicembcr of 0111: iu'iprcvecl swilchlng (L .1 e 19 indicates a blcck of insulating maicrial-scated in fbhe handle member 17 cf the casing of the plug, 111ml 20 imlicatcs a, similar bleak held by a. huge 0f the casing 18 and securely held in posilicn next the block 19. 22 indicates plug contacts nouuted iu lzlle bloc-la. 19. As best Shown in 1 t Z0 is provided with openings therethrcugh adapted t0 register will; he cpcxuugs in which the contact phage 2E2 pcsiticneli. Eucll of the plugs 22 is prcvided with u seclzei; in each cl which sockets. the end of one of the Wires 5, 3 ml'cpbcc. Kc be secured by .mezms of solder 01' in my crther suitable munueu The "Wires eig'zlcnd through a suitable cpeuiug in the cud the handle lDfilflb-Sl" 17 frcm which pcinjs they lead to a motor 01' clhcr device Where an electric current to be used, F1

ceptaclcs 15 is bored out and the end of each of the contact plugs is split so that the ceuizact plugs 22 may be forced inte close electrical cculact' with acid ccntcci', recepicicles 1-5, this being made possible by reascu of the fact thzu; the ends cf lzhe contact plug; 22 are of such a size relative t0 the cpeuiugs 'fiiuough the block 2G that the cuter ends of the col 153cc receptacles 15 with the insuluticu cniei? said cue, 'ugs tlut tmgbl ighe block 21% 53-3 .imficates c 31d cl any suitable type hinged. upcn file caeiug 10 of izhe receptacle member. 'Whcu 'lillfi plug member is itl'lclrmm mm-fiche recep tecle. bile ccumct reccutacies 14' we seem J yr, e I

rated from each othei' by a comparatively wide gap and also. by the insulation about said contact receptacles. When the plug is in operative position relative to the ,receptacle the block 20 serves to insulate the contact'plugs 22 from each other and the contact receptacles from each other so that there is no dangerdof an are between any two from the standpoint r Moreover, the absence of of the contact plugs or contact receptacles. This complete insulation of the current carrying parts is of very greatiinportance in a plug switching device designed for use with high voltage currents. Whenever it is desired to reinov'e'one of the contact'plugs :22 for any reason, this can be done very easily by simply unscrewing the. casing member 18 from the casing member 17, removing the block 20 -and"pulling' the contact plug 22 out of the block 19 to the left in Fig. l. Inasmuch as these contact plugs -22 are held in position in this Way, without the use of screws or other binding parts, repairs may be made much more easily than would otherwise be the case.

screws or other securing parts is ofconsiderable importance of elhciency oi the device when in use. In many constructions heretofore the metal parts by which the con tact plugs have been fixed in the insulating bases have been instrumental in the development of leakage or short circuiting, es-

pecially during damp weather.

Referring now to Figs. 4, 5 and 6, which show a modification. of the device of Figs. 1, 2 and 3, 26 indicates the casing of the re ceptacle, secured to the back or which is a base 27 of suitable dielectricmaterial. 28 indicates a block of similar material secured in any appropriate manner to the base 27. 29 indicates contact receptacles mounted in suitable insulating casingsBO and secured in any suitable manner-in said block 28. 31

*indicates lead wires the ends of which are secured in any suitable manner on the block 28 and electricallyconnected to the contact receptacles 29. 32"33 indicate the casing members of the plug, binding between them the insulating blocks 347-35, as in the pre ferred form of construction, the casing nieniher 33, however, extending beyond the outer face of the block 35. 36 indicates substan tially rectangular blocks oicopper or other suitable conducting material mounted in suitable openings in the block 35. 3'4" indiin suitable 38 indicates socket memberssecured by screws to the blccl siifi, in'recesses 39 in which the ends of the a. t 40 are secured by neans'oif s0' lderingcr in any other approved 'mauner, the said wires d0 being adapted to be con-' nectcd at their-opposite ends to a motor or 1 other electrically-operated device. It will be readily undenstood by an nspection oi? contact plug .ing thereiroin,

- blocks together,

parts by which they are connectedto the held in position between the inwires 40 are sulating blocks 34: and 35 without the use of screws or other metallic parts which might lead to a breakdown of the insulation. The insulating casings 3O protect the ends of the contact receptacles 29, and the tongue il forming a part of the block 35 forms an efiectual barrier between the 'contact receptacles 29 which: are slotted to receive the contact plugs'37, as will be readily understood, and also forms an efi'ective barrier between said contact plugs 37 as they are being withdrawn from the contact receptacles 29.. I

While we have shown three contact plugs in the preferred form of device and only two contact plugs in the modified form, we do not restrict ourselves to the-precise num ber oi? parts shown in either form.

-That wh'ch we claim as o r-invention,

and desire to secure by LettersPatent, is, 1. In a plug switching device, the com bination of a block of insulating material,

a" casing member in which said block is mounted, a plug contact mounted in said block and extending therefrom, a second block of insulating material having a recess into which said contact plug extends, one of saidblocks having an opening for the insertion 01'? a wire adapted to be connected to said contact plug, and a second casing member mounted upon said second-named block having. a screw-threaded, connection with said first-named casing member whereby said two blocks are clamped together.

2. in a plug switching device, the combination of a block of insulating material, a

mounted therein and extendsccond block of insulating material having a recess into whichsaid contact plug extends, said first-named block having an opening therein for the insertion of a Wire adapted to be connected to said contact plug, means. independent of said contact plug for clamping said two said second-named block extending bcyoi'id theend of said contactplug and the recess in said second-named block being larger than the end of said contact plug, whereby a contact receptacle can be inserted over said contact plug and inside of said recess. I

1 3, In a lug switching" device, the combination o a contact receptacle, means for holding said receptacle in fixed position, means for connecting a wire to said contact receptacle, a block of insulating material, a

contact plug mounted in a. recess in said block and extending therefrom, means for connecting a wire to said'contact plug 139 Mock ints engagement W115: said. 90mm; zzceptacle.

ALLEN PEARL. @HARLES A. JLNSEN. Witnesses W: H. DI} B17511, ROPHENE FREEMAN. 

